Apparatus for drying or smoldering loose material



Nov. s, 1928. 1,690,444

0. DOBBELSTEIN APPARATUS FOR DRYING 0R SMOLDERING LOOSE MATERIAL FiledNov. 26, 1926 I Patented Nov. 6 1928.

UNITED STATES PATENT OFFICE.

O'I'IO DOBBELS'IEIN, DECEASED, LATE OF ESSEN-ON-THE-BUHR, GERMANY, BYKARO- LINE DOBBELS'IEIN, ADMINISTRATOR, F ESSEN-ON-THE-RUHR, GERMANY.

APPARATUS FOR DRYING OR SMOLDERING LOOSE MATERIAL.

Application flied November 26, 1926, Serial No. 150,909, and in GermanyNovember 30, 1925.

This invention relatesto improvements in apparatus for drying orsmoldering loose material, and more particularly in apparatus comprisina rotary member provided with annular c ambers separated fromone-another by annular heating chambers. The object of the improvementsis to provide an apparatus of this class in which the rotary art isseparated in an air-tight manner rom the chambers receiving the gas orvapor developed from the loose material by heating the same. Anotherobject of the improvements is to provide an apparatus in which loosematerial which is not subject to sintering can be more readily treated.With these ob ects in view the invention consists in disposing the saidapparatus with its axis of rotation vertically, so that the chamberscontaining the loose material are horizontal.

2o Thereby water seals can be provided for the rotary drum, and theloose material is su ported on the horizontal walls of the cham ers.

For the purpose of explaining the invention an example embodying thesame has been shown in the accompanying drawing, in which the samereference c "aracters have been used in all the views to indicatecorresponding parts. In said drawing,

3o ig. 1, is a sectional elevation showing the improved apparatus, and

Fig. 2, is a sectional plan view taken on the line-22 of Fig. 1.

In the example shown in the drawin the as improved apparatus comprises arotary rum 3 provided at its bottom with an annular rail 4 supported onsuitable rollers 5. 1 Further, teeth 8 are secured to the bottom of thedrum 3, and the said teeth are in mesh with a bevel gearin 9 forimpartin rotary movement to the rum. Below t e said drum ,there is astationary tubular member 25 which is open at its to and closed at itsbottom by a lid 11 provi ed with a plurality M5 of burners f forsupplying a heating medium "to the drum. At its top t e drum is providedwith a discharge pipe or stack 6. The drum is' provided with superposedpairs of annular plates 7 closed at their outer circumtO ferences andcommunicating at their inner circumferences with the inner part of thedrum 3 as will be described hereinafter. Between the superposed pairs ofplates 7 annular chambers b are provided, which are closed at theirinner circumferences and open at their outer circumferences, the saidchambers being adapted to receive the loose material.

The drum is provided with radial partitions 10 dividing the same intochambers d and e. The heating chambers 0 provided between the plates 7are divided by radial partitions g extending all through the saidchambers into sectional chambers, and each sectional chamber is providedwith a radial partition m extending from the wall of the drum 3 to apoint away from the outer circumference of the plates 7. The wall of thedrum 3 is formed with openings 11 and is connecting each chamber d and 8with two adjacent sectional chambers c. The chambers orpassages d areopen at their bottom ends and closed at their top ends, while thechambers or passages e are open at their top ends and closed at theirbottom ends.

The drum 3 and plates 7 are surrounded by a cylinder 12 divided by apartition 13 into two chamb rs s and t each having an outlet 14: andseparated from the drum 3 and plates 7, 7 by a foraminated cylinder 15.

At one side of the cylinder 12 there is a vertical chamber p, andthrough one side of the said chamber plungers o are radially movable.The chamber p is adapted to re-- ceive the loose material, whichmaterial is pushed by the plungers (i into the annular chambers b.Adjacent to the chamber {1 there is an outlet 1- extending the who eheight of the drum and adapted to remove the loose material at the endof the smoldering operation. For withdrawing the smoldered material fromthe chambers 12 into the outlet 1' scrapers n are provided, which extendinto the chambers b to the wall of the drum 3.

, Water seals u and v are provided for closing the chambers s and t andthe chambers b as against the outer air and the drum 3.

As shown in Fig. 1, the uppermost plate 7 is provided with a pair ofconcentric flanges 18 engaged by a downwardly directed flange 19 of theannular jacket 8, t. In a similar way, an inward extension of the bottomof the jacket 8, 25 carries a pair of concentric flanges 2O engaged by aflange 21 depending from the bottom plate 7. The annular spaces includedbetween the flanges 18 and 20 are filled with a suitable sealing liquid.

In the operation of the apparatus the drum 3 is rotated by means of thebevel gearing 8, 9, heating gas is supplied through the pipes or burnersf, and the loose material contained within the chamber or hopper p iscontinuously pushed into the chambers b by means of the plungers 0. Theheating gas rises within the chambers d and flows therefrom through theopenings 23 into the heating chambers provided between the plates 7.Within the said chambers the gas flows outwardly and inwardly again,whereupon it is discharged into the chambers e and the discharge pipe orstack 6. The direction of the flow of the heating gas has been indicatedin the figures by arrows. By the rotary movement of the drum 3 the fuelis gradually carried around to the scrapers n by means of which it isdelivered through the outlet 1'. The gas developed from the materialflows into the chambers s and 6 from whence it is removed throu h thepipes 14. In the retracted positions of the plungers o the loosematerial falls to the front side of the plungers from the side thereof.In such cases in which the said plungers are not located one above theother but are laterally displaced with relation to each other thematerial drops in front of the said plungers from above.

By providing horizontal chambers for the loose material now sinteringmaterial can be treated.

'While in describing the invention reference has been made to aparticular example embodying the same, it is to be understood that theinvention is not limited to the construction shown in the drawing, andthat various changes may be made in-the general arrangement of theapparatus and the construction of its parts without departing from theinvention.

Claims:

1. An apparatus for heating loose material. comprising a vertical rotarydrum provided with annular heating chambers located one above the otherand spaced from each other to provide chambers for the loose material,heating means for said heating chambers, means for supplying the loosematerial to the chambers provided between the heating chambers and toremove the said material therefrom. a stationary jacket surrounding saiddrum and heating chambers and adapted to collect the gas or vapordevelopcd from the loose material, and a liquid seal between said jacketand rotary drum.

2. An apparatus for heating loose material, comprising a vertical rotarydrum provided with annular heating chambers located one above the otherand spaced from each other to provide chambers for the loose material,heating means for said heating chambers, a hopper means for supplyinthe. loose material from said hopper to the c ambers provided betweenthe heating chambers simultanemisly, means to remove the loose materialfrom said chambers simultaneously to the outlet, and a stationary jacketsurrounding said drum and heating chambers and adapted to collect thegas or vapor developed from the loose material.

3. An apparatus for heating loose material, comprising a vertical rotarydrum provided with annular heating chambers located one above the otherand spaced from each other to provide chambers for the loose material,heating means for said heating chambers, a hopper means for supplyin theloose material to the chambers provide between the heating chamberssimultaneously, means to remove the loose material from said chamberssimultaneousl to the outlet, a stationary jlacketsurroun ing said drumand heatin 0 ambers and adapted to collect the gas or vapordeveloped'from the loose material, and plungers radially reciprocatingwithin said jacket in position for pressing loose material into thechambers for the loose material.

4. An apparatus for heating loose material, comprising a vertical rotarydrum provided with annular heatin chambers located one above the otheran spaced from each other to provide chambers for the loose material,heating means for said heating chambers, a hopper means for supplyingthe loose material to the chambers provided between the heating chamberssimultaneously, means to remove the loose material from said chamberssimultaneously to the outlet, a stationary jacket surrounding said drumand heating chambers and adapted to collect the gas or vapor developedfrom the loose material, and plungers radially reciprocating within saidjacket in osition for pressing loose material into the c ambers for theloose material, said plungers being displaced with relation to eachother externally of the drum.

5. An apparatus for heating loose material comprising a vertical rotarydrum provided with annular heatin chambers located one above the otherand spaced apart to provide intermediate chambers for said loosematerial, heating means for said heating chambers. said drum having"ertical passages some of which are open at the bottom and incommunication with said intermediate chambers, the remaining passagesbeing in 1,ooo,444 3 communication with said intermediate chambers forcollecti the vapors expelled from bers and beinx open at the top todeliver to the loose materia durinfi heating. the outlet of t e drum,means for supplying In testimony whereof hereunto afiix my the loosematerial to said intermediate chamsignature. 5 bers, means for nemovingthe loose material Fm u l- TEIN,

fr said int rmediate chamb r and Administrator of the Estate of OttoDobbelatel'n, jacket surrounding said drum and said chain- Deceawd-

